<template>
    <div>
    <!--面包屑导航区域-->
        <el-breadcrumb separator-class="iconfont icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图区域 -->
    <el-card>
        <!-- 添加角色按钮区域 -->
        <el-row>
            <el-col>
                 <el-button type="primary" @click="addRolesDialogVisible = true">添加角色</el-button>
            </el-col>
        </el-row>
        <el-table :data="roleList" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
            <template slot-scope="scope">
            <el-row :class="['bdbottom', i1===0 ? 'bdtop' : '','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
            <!-- 渲染一级权限 -->
                <el-col :span="5">
                 <el-tag closable @close="removeRightById(scope.row, item3.id)">
                    {{item1.authName}}
                 </el-tag>
                 <i class="iconfont icon-double-arro-right"></i>
                </el-col>
            <!-- 渲染二级和三级权限 -->    
                <el-col :span="19">
                <!--通过 for 循环 嵌套渲染二级权限-->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                    <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="iconfont icon-double-arro-right"></i>
                    </el-col>
                    <el-col :span="18">
                        <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                    </el-col>
                </el-row>
                </el-col>
            </el-row>
            </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
             <el-table-column label="角色名称" prop="roleName"></el-table-column>
             <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
             <el-table-column label="操作" prop="roleDesc">
                <template slot-scope="scope">
                    <el-button type="primary" @click="showEditRolesDialog(scope.row.id)">编辑</el-button>
                    <el-button type="danger" @click="deleteRoles(scope.row.id)">删除</el-button>
                    <el-button type="warning" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
             </el-table-column>
        </el-table>
    </el-card>
    <el-dialog
  title="提示"
  :visible.sync="setRightDialogVisible"
  width="50%" @close="setRightDialogClosed">
  <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>

    <!--修改角色的对话框-->
<el-dialog
  title="修改角色"
  :visible.sync="editRolesDialogVisible"
  width="50%" @close="editRolesDialogClosed">
  <!--内容主体区域-->
 <el-form :model="editRolesForm" :rules="editRolesFormRules" ref="editRolesFormRef" label-width="70px">
    <el-form-item label="id" >
    <el-input v-model="editRolesForm.roleId" disabled></el-input>
  </el-form-item>
  <el-form-item label="角色名" prop="roleName">
    <el-input v-model="editRolesForm.roleName"></el-input>
  </el-form-item>
  <el-form-item label="角色描述" prop="roleDesc">
    <el-input v-model="editRolesForm.roleDesc"></el-input>
  </el-form-item>
 </el-form>
  <!--底部区域-->
  <span slot="footer" class="dialog-footer">
    <el-button @click="editRolesDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editRoles">确 定</el-button>
  </span>
</el-dialog>

 <!--添加用户的对话框-->
    <el-dialog
  title="添加用户"
  :visible.sync="addRolesDialogVisible"
  width="50%" @close="addRolesDialogClosed">
  <!--内容主体区域-->
 <el-form :model="addRolesForm" :rules="addRolesFormRules" ref="addRolesFormRef" label-width="70px">
  <el-form-item label="角色名" prop="roleName">
    <el-input v-model="addRolesForm.roleName"></el-input>
  </el-form-item>
  <el-form-item label="角色描述" prop="roleDesc">
    <el-input v-model="addRolesForm.roleDesc"></el-input>
  </el-form-item>
 </el-form>
  <!--底部区域-->
  <span slot="footer" class="dialog-footer">
    <el-button @click="addRolesDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addRoles">确 定</el-button>
  </span>
</el-dialog>
    </div>
</template>
<script>
export default {
   data() {
      return {
          // 所有角色列表
          roleList: [],
        // 控制分配权限对话框
        setRightDialogVisible: false,
        // 所有权限的数据
        rightsList: [],
        // 树形控件的属性绑定对象
        treeProps: {
            label: 'authName',
            children: 'children'
        },
        // 默认选中的节点值
        defKeys: [],
        // 当前即将分配权限的角色id
        roleId: '',
        // 查询到角色信息对象
        editRolesForm: {},
        editRolesFormRules:{
               roleName: [
                   {required:true, message:'请输入角色名', trigger: 'blur'}
               ],
               roleDesc: [
                   {required:true, message:'请输入描述', trigger: 'blur'},
               ]
          },
        // 编辑角色的对话框
        editRolesDialogVisible: false,
        // 添加角色的对话框
        addRolesDialogVisible: false,
        //添加角色
        addRolesForm: {
            roleName: '',
            roleDesc: ''
        },
        // 添加角色验证规则
        addRolesFormRules:{
             roleName: [
                   {required:true, message:'请输入角色名', trigger: 'blur'}
               ],
            roleDesc: [
                   {required:true, message:'请输入描述', trigger: 'blur'},
               ]
        }
      } 
   },
   methods: {
       // 获取所有角色的列表
       async getRolesList() {
         const {data: res} = await this.$http.get('roles')

         if(res.meta.status !== 200) {
             return this.$message.error('获取角色列表失败!')
         }
         this.roleList = res.data
         console.log(this.roleList)
       },
       // 根据Id删除权限
       async removeRightById(role, rightId) {
           //根据弹框是否删除
       const confirmResult =  await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if(confirmResult !== 'confirm') {
            return this.$message.info('取消了删除')
        }

        const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        
        if(res.meta.status !== 200 ) {
            return this.$message.error('删除权限失败')
        }
         
        //  this.getRolesList()
        role.children = res.data
       },
       // 展示分配权限
       async showSetRightDialog(role){
           this.roleId = role.id
           // 获取所有权限的数据
         const {data: res}  = await this.$http.get('rights/tree')

         if(res.meta.status !== 200 ) {
             return this.$message.error('获取权限数据失败')
         }
 
        // 获取的权限数据保存到 data
        this.rightsList = res.data
        
        // 递归获取三级节点id
        this.getLeafKeys(role, this.defKeys)
        
        this.setRightDialogVisible = true

       },
       // 通过递归形势，获取角色下所有三级权限的id，并保存到defKeys数组里
       getLeafKeys(node, arr){
           //如果当前node节点不包含children属性，则为三级节点
           if(!node.children) {
            return arr.push(node.id)
           }

           node.children.forEach(item => this.getLeafKeys(item, arr))
       },
       // 监听分配权限对话框的关闭事件
       setRightDialogClosed () {
           this.defKeys = []
       },
       async allotRights() {
           const keys = [
               ...this.$refs.treeRef.getCheckedKeys(),
               ...this.$refs.treeRef.getHalfCheckedKeys()
           ]

           const idStr = keys.join(',')

         const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr})

         if(res.meta.status !== 200 ) {
             return this.$message.error('分配权限失败')
         }

        this.$message.success ('分配权限成功')

        this.getRolesList()
        this.setRightDialogVisible = false
       },
       //修改对话框
       async showEditRolesDialog(id) {
         const {data: res} = await this.$http.get('roles/' + id)
         if(res.meta.status !=200) {
             return this.$message.error('查询用户信息失败!')
         }
         this.editRolesForm = res.data
         console.log(this.editRolesForm)
         this.editRolesDialogVisible = true
       },
       // 删除角色
       async deleteRoles(id) {
            // 弹窗询问用户是否删除数据
         const confirmResult = await  this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err);

        // 如果用户确认删除，则返回值为字符串 confirm
        // 如果用户取消删除，则返回值为字符串 cancel
        if(confirmResult !== 'confirm') {
            return this.$message.info('已经取消删除')
        }

        const {data:res} = await this.$http.delete('roles/' + id)

        if(res.meta.status !==200) {
            return this.$message.error('删除用户失败!')
        }
        this.$message.success('删除用户成功')
        this.getRolesList()
       },
       // 关闭对话框，重置数据
       editRolesDialogClosed() {
           this.$refs.editRolesFormRef.resetFields()
       },
        // 编辑角色信息提交
       editRoles() {
            this.$refs.editRolesFormRef.validate(async valid => {
                if(!valid) return
                //发起数据请求
                const {data: res} = await this.$http.put('roles/'+ this.editRolesForm.roleId, {roleName: this.editRolesForm.roleName, roleDesc:this.editRolesForm.roleDesc
                })

                if(res.meta.status !==200) {
                    return this.$message.error('更新角色信息失败')
                }

                //关闭对话框
                this.editRolesDialogVisible = false
                // 刷新数据列表
                this.getRolesList()
                //数据修改成功
                this.$message.success('更新角色信息成功')
            })
       },
       // 添加用户对话框窗口关闭
       addRolesDialogClosed() {
            this.$refs.addRolesFormRef.resetFields()
       },
       // 添加角色请求
       addRoles() {
            this.$refs.addRolesFormRef.validate(async valid => {
               if (!valid) return
               // 发起真正的网络需求
             const {data:res} = await  this.$http.post('roles', this.addRolesForm)
             if(res.meta.status !==201) {
                 this.$message.error('添加用户失败')
             }
             this.$message.success('添加用户成功')
             //隐藏用户对话框
             this.addRolesDialogVisible = false
             // 重新获取用户列表数据
             this.getRolesList()
           })
       }
   },
   created() {
       this.getRolesList()
   }
}
</script>
<style scoped lang="less">
.el-tag {
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom {
    border-bottom: 1px solid #eee;
}

.vcenter {
    display: flex;
    align-items: center;
}
</style>
